/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.dex.file;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

import com.android.dx.rop.cst.Constant;

/**
 * File header section of a {@code .dex} file.
 */
public final class HeaderSection extends UniformItemSection {

	/** {@code non-null;} the list of the one item in the section */
	private final List<HeaderItem> list;

	/**
	 * Constructs an instance. The file offset is initially unknown.
	 * 
	 * @param file
	 *            {@code non-null;} file that this instance is part of
	 */
	public HeaderSection(DexFile file) {
		super(null, file, 4);

		HeaderItem item = new HeaderItem();
		item.setIndex(0);

		this.list = Collections.singletonList(item);
	}

	/** {@inheritDoc} */
	@Override
	public IndexedItem get(Constant cst) {
		return null;
	}

	/** {@inheritDoc} */
	@Override
	public Collection<? extends Item> items() {
		return list;
	}

	/** {@inheritDoc} */
	@Override
	protected void orderItems() {
		// Nothing to do here.
	}
}
